diff --git a/fraction.hpp b/fraction.hpp
index 91c169b..8dbaacb 100644
--- a/fraction.hpp
+++ b/fraction.hpp
@@ -61,6 +61,8 @@ namespace FractionNS {
     bool operator>=(const double) const;
     bool operator>=(const Fraction&) const;
 
+    // <=> would go here
+
     // Binary math operators
     Fraction& operator+(const int) const;
     Fraction& operator+(const Fraction&) const;